[opensourcedex]

best-of ranking · updated nightly

Best Open Source Finance & Accounting Tools

Ranked by GitHub stars — actual adoption, not editorial taste. All 10 are free, open source and self-hostable; license and last activity on every entry.

  1. 1
    ERPNext ★ 39K

    Comprehensive business management, tailored for you

    GPL-3.0 Python pushed 2026-09-17 details →
  2. 2
    Midday ★ 15K

    Streamline your business finances and operations

    AGPL-3.0 TypeScript pushed 2026-06-13 details →
  3. 3
    aureuserp ★ 12K

    Free and Open Source ERP platform

    MIT PHP pushed 2026-09-17 details →
  4. 4
    Lago ★ 11K

    Transform complex usage data into accurate, real-time billing

    AGPL-3.0 Go pushed 2026-09-17 details →
  5. 5
    Polar ★ 10K

    Modern payment infrastructure for digital products and SaaS

    Apache-2.0 Python pushed 2026-09-17 details →
  6. 6
    Akaunting ★ 10K

    Free online accounting for small businesses and freelancers

    NOASSERTION PHP pushed 2026-09-17 details →
  7. 7
    Invoice Ninja ★ 10K

    Send invoices, accept payments, manage your business—all free

    NOASSERTION PHP pushed 2026-09-17 details →
  8. 8
    idurar-erp-crm ★ 8.8K

    Free Open Source ERP CRM Software Accounting Invoicing | Node.Js React

    AGPL-3.0 JavaScript pushed 2026-08-14 details →
  9. 9
    TaxHacker ★ 6.7K

    Self-hosted AI accounting app. LLM analyzer for receipts, invoices, transactions with custom prompts and categories

    MIT TypeScript pushed 2026-09-14 details →
  10. 10
    Expensify ★ 5.0K

    Simplify expense management for businesses of all sizes

    MIT TypeScript pushed 2026-09-17 details →
method stars desc · snapshot from github api refresh nightly related Compliance & Risk Management, Human Resources (HR), Legal, Marketing & Customer Engagement, E-commerce Platforms, Document Management & E-Signatures

Related best-of lists

best Compliance & Risk Management →best Human Resources (HR) →best Legal →best Marketing & Customer Engagement →best E-commerce Platforms →best Document Management & E-Signatures →

last updated nightly · ranking method: github stars, live-tracked

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Frequently asked questions

What is the best open source Finance & Accounting tool in 2026?

ERPNext leads the ranking with 39,326 GitHub stars, ahead of Midday. Rankings use live GitHub star counts, refreshed nightly.

How is this list of Finance & Accounting tools ranked?

By GitHub stars — a proxy for adoption and community size. Each entry also shows its licence, primary language and last commit date, so you can judge maintenance activity rather than trusting the ranking alone.

Are the best Finance & Accounting tools free?

Every project on this list is open source and free to self-host. Some also offer paid managed hosting, but the software itself carries no licence fee.